Reinforced-concrete floor.



G. M. GRAHAM.

REINFORCED GONGRETB FLOOR. APPLICATION FILED APR. 6, 1912.

Patented Oct. 7, 1913.

G. M. GRAHAM.

REINFORCED CONCRETE FLOOR.

APPLICATION FILED APR. 6, 1912. 1 @7525 1 Patented Oct. 7, 1913.

2 SHEETS-SHEET 2.

UNITED STAIES PATENT OFFIQE.

GEORGE M. GRAHAM, OF CHICAGO, ILLINOIS, ASSIGNOR T0 G. M. SYSTEM 00., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

REINFORCED-CONCRETE FLOOR.

T 0 all whom it may concern Be it known that I, GEORGE M. GRAHAM, a citizen of the United States of America, and a resident of Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Reinforced-Concrete Floors, of which the following is a specification.

This invention relates to that type of reinforced concrete floors in which the skeleton center of metal rods or wires which reinforces and supports the concrete floor mass is placed under initial tension before such concrete floor mass is applied thereto, and more especially relates to that particular type of said floors in which the pulling stress or load of said skeleton center is imposed mainly upon the walls or marginal portions of the building structure at points best adapted to withstand the load or stress, an example of which constitutes the subject matter of my prior application for Letters Patent, Serial No. 648,806, filed September 11th, 1911. And the present improvement has for its object to provide a simple and eiiicient structural arrangement of parts, wherein the load or stress upon the skeleton rod or wire center of the floor units is directed toward and imposed mainly upon the vertical supporting columns of the building, with an avoidance of a lateral stress upon the walls or beams of the building, which would tend to draw the same out of their proper position, all as will hereinafter more fully appear.

In the accompanying drawings :-Figure 1, is a fragmentary plan view illustrating the general arrangement of parts in the present improved construction, previous to the application of the concrete floor mass. Fig. 2, is an enlarged horizontal section on line ww, Fig. 3, of one corner of the structure, and showing the corner column and its accessories arranged in accordance with the present invention. Fig. 3, is a detail vertical section of the same, on line w50, Fig. 2. Fig. 1, is a view similar to Fig. 3, and on line w w Fig. 5, of a central outer column and its accessories. Fig. 5, is a detail vertical section of the same, on line w -w Fig. 4.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 represents Specification of Letters Patent.

Application filed April 6, 1912.

Patented Oct. '7, 1913.

Serial No. 688,898.

the series of columns, and 2 the usual horizontal beams secured to said columns to form a skeleton structure which in turn carries the walls, partitions and other parts of a fire proof building.

3 and 4 are the upper and lower wrought metal chords or carrier members extending from column to column of the building and having bearing upon the outer surfaces of said columns. As in a prior construction set forth in my aforesaid application, Serial No. 648,806, the aforesaid chords or carrier members 3 and 4 are disposed in horizontal planes adjacent to the respective top and bottom surfaces of the next adjacent horizontal beams 2, and while said chords or carrier members may be made individual to adjacent columns 1, and individually attached thereto at their ends, it is preferable on the score of economy to form said chords or carrier members of sufiicient length to encompass a greater number of columns, and in cases where the building is not too great in size, to encompass the entire series of columns of the building, with the meeting ends of the chords or carrier members connected together in any suitable manner, as endless formations.

lVith the described arrangement of the chords or carrier members 3 and 1', at points exterior of the adjacent beams 2, and after the attachment of the hereinafter described series of longitudinal rods or wires which constitute the skeleton reinforcing centers or webs of one or more floor units, the intervening spaces between the beams 2, and said chords or carrier members 3 and 4:, are adapted to receive fillings of concrete, which when set or hardened provide eliective and substantial support to the aforesaid chords or carrier 8 and 4, to more effectively withstand the stress the same are required to withstand as the floor mass of concrete is applied to the skeleton center or web above referred to.

5 and 6 are upper and lower diagonal.

chords 0r carrier members, extending diagonally from column 1 to column 1 of the building and suitably connected at their ends to said columns. In the preferred construction shown, each diagonal chord or carrier member 5 or 6, is formed by a plurality of bars or rods, usually two in number, disposed side by side as members of an endless link and having loops or eyes at the end adapted to encircle the column 1, as shown.

7 and 8, are upper and lower series of longitudinal members which in connection with the aforesaid diagonal chords or carrier members 5 and 6, constitute the before mentioned skeleton reinforcing center or web of the floor, and upon and around which the mass of concrete is applied in any usual manner to form the completed floor. In the preferred construction shown, each of the upper and lower longitudinal members 7 and 8, will as in the case of the diagonal members 5 and 6, be formed of a plurality of rods or wires, usually two in number, disposed side by side and having eyes or loops at their ends for attaching engagement with aforesaid upper and lower chords or carrier members 3 and 4:.

A material feature of the present invention involves the attachment of the upper and lower series of longitudinal members 7 and 8 to the aforesaid diagonal chord or carrier members 5 and 6, at the points where the same intersect, and which attachments may be attained in any ordinary and suitable manner, preferably a series of twists 9 in the longitudinal members 7 and 8, immediately adjacent to the points of intersection.

The above described connection of the longitudinal members 7 and 8 to the diagonal chords or carrier members 5 and 6, and the before described connection of said longitudinal members 7 and 8 to the chords or carrier members 3 and 4-, constitute the sole supporting connections of the upper and lower series of longitudinal members 7 and 8, and the parts so interconnected are adapted to transmit the floor stress to the columns 1 of the building in a Very eifective manner, and relieve the beams 2 and other portions of the building from lateral weakening strains.

As in my prior application, Serial No. 648,806, the series of upper and lower longitudinal rods or wires 7 and 8 may be duplicated in a transverse direction, where floors of great stability and strength is required. No claim as to novelty is herein made to such duplication in that the same is fully disclosed and claimed in my aforesaid application, Serial No. 648,806.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent, is:

1. In a reinforced concrete floor, the combination of a series of outer columns, a series of horizontal beams connecting said columns, horizontal chords or carrier members disposed outside of said horizontal beams and attached to and having bearing on the outer portions of the columns, a series of longitudinal rods or wires attached to said carrier members and overlapping the horizontal beams to constitute the skeleton center of the floor, and a mass of concrete inclosing said rods and carrier members to form the body of the floor.

2. In a reinforced concrete floor, the com- ..bination of a series of outer columns, a series of horizontal beams connecting sald col-- umns, upper and lower horizontal chords or carrier members disposed outside of said horizontal beams and attached to and having bearing on the outer portions of said columns, upper and lower series of longitudinal rods or wires attached to said carrier members and overlapping the horizontal beams to constitute the skeleton center of the floor, and a mass of concrete inclosing said rods and carrier members to form the body of the floor.

3. In a reinforced concrete floor, the combination of a series of outer columns, a series of horizontal beams connecting said columns, a series of longitudinal rods or wires supported at their ends and overlapping the horizontal beams and continuous between the same to constitute the skeleton center of the floor, diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, said diagonal chords having the form of flattened links the end loops of which embrace said columns and a mass of concrete inclosing said rods and diagonal members to form the body of the floor.

a. In a reinforced concrete floor, the combination of a series of outer columns, a series of horizontal beams connecting said columns, upper and lower series of longitudinal rods or wires supported at their ends and overlapping the horizontal beams and continuous between the same to constitute the skeleton center of the floor, upper and lower diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, said diagonal chords having the form of flattened links the end loops of which embrace said columns and a mass of concrete inclosing said rods and diagonal members to form the body of the floor.

5. In a reinforced concrete floor, the combination of a series of outer columns, a series of horizontal beams connecting said columns, a series of longitudinal rods or wires supported at their ends and overlapping the horizontal beams and continuous between the same to constitute the skeleton center of the floor, diagonal chords or carrier members to form the body of the floor, said longitudinal rods or wires being attached to the diagonal members at points of intersection.

6. In a reinforced concrete floor, the combination of a series of outer columns, a series of horizontal beams connecting said columns, upper and lower series of longitudinal rods or wires supported at their ends and overlapping the horizontal beams and continuous between the same to constitute the skeleton center of the floor, upper and lower diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, said diagonal chords having the form of flattened links the end loops of Which embrace said columns and a mass of concrete inclosing said rods and diagonal members to form the body of the floor, said longitudinal rods or wires being attached to the diagonal members at points of intersection.

7. In a reinforced concrete floor, the combination of a series of columns, a series of horizontal beams connecting said columns, horizontal chords or carrier members attached to and having bearing on the outer portions of the columns, a series of longitudinal rods or wires attached to said carrier members, diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, and a mass of concrete inclosing said rods and diagonal members to form the body of the floor.

S. In a reinforced concrete floor, the combination of a series of columns, a series of horizontal beams connecting said columns, upper and lower horizontal chords or carrier nembers attached to and having bearing on the outer portions of said columns, upper and lower series of longitudinal rods or wires attached to said carrier members, upper and lower diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, and a mass of concrete inclosing said rods and diagonal members to form the body of the floor.

9. In a reinforced concrete floor, the combination of a series of columns, a series of horizontal beams connecting said columns, horizontal chords or carrier members attached to and having bearing on the outer portions of the columns, a series of longitudinal rods or wires attached to said carrier members, diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, and a mass of concrete inclosing said rods and diagonal members to form the body of the floor, said longitudinal rods or wires being attached to the diagonal members at points of intersection.

10. In a reinforced concrete floor, the com bination of a series of columns, a series of horizontal beams connecting said columns, upper and lower horizontal chords or carrier members attached to and having bearing on the outer portions of said columns, upper and lower series of longitudinal rods or wires attached to said carrier members, upper and lower diagonal chords or carrier members arranged in crossed relation and attached at their ends to diagonally disposed columns, and a mass of concrete inclosing said rods and diagonal members to form the body of the floor, said longitudinal rods or wires being attached to the diagonal mem bers at points of intersection.

Signed at Chicago, Illinois this 4th day of April 1912.

GEORGE M. GRAHAM.

Witnesses ROBERT BURNs, HENRY Mon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). G. 

